Because we only had one major Dwarf in LotR, now everybody thinks dwarf = Gimli = dwarf

It wasn't just Gimli, Weta made all the Dwarves look like squashed humanoid creatures in LOTR. As someone who came into Tolkien via PJ, it's going to be difficult ignoring my image of all the Dwarves as talking beards. That's why Oin and Gloin are my favourites at the moment.

But on topic, Thorin looks really cool. I just know Armitage is going to deliver. I love his armour and Orcrist is incredibly beautiful, it may become my favourite Middle-earth sword.